Rehabilitation of Sanitary Sewer Pipelines

An extensive investigation into the methods and materials available for use in rehabilitating sanitary sewers is presented. Information has been developed on the features and benefits of both internal and external sewer pipeline rehabilitation. The analysis of various types of failures that occur in sanitary sewer pipelines shows that a variety of correction methods can be utilized. Twenty-three problem areas for rehabilitation have been identified, along with a choice of correction methods and special considerations for them. Dewatering of the existing system for rehabilitation is an important determinant of the method and material selected. In addition to dewatering, the diameter, cross section, variation inflow, number connections, access, location, depth and nature of effluent, movement of groundwater and soil settlement conditions are all important factors of rehabilitation evaluation.